Apparatus for dephlegmating vapors



Jan. 20, 1931. w c ss 1,789,670

APPARATUS FOR DEPHLEGMATING VAPORS Filed Oct. 29, 926

LEVZZ REGl/LAT/IVG fill ICE.

REBo/LER W/T/VL'JJ. VE 0R 1 f V ATTORNEY pipes associated with the pansand Adifl erence in pressure, between the upper and lower portions ofthe column, of from fifty to eighty inches of water-measured pressurehasbeen found to be the most satisfactory and produce a rate of velocity ofthe vapors giving the most satisfactory and efficient results in theselective absorption of l the higher boiling point products. 7 y

In addition to the factors mentioned, the shape of the slots cut in thelower edges of the riser caps has been .found to have considerableeffect in the achieving ofsatisfac tory separation of. the objectionableoil fractions. These serrations, or slots,have preferably the form of atruncated triangle.

The construction has been successfully utilized in making endpointgasoline, by controlling the velocity of the vapors within the limitsmentioned and passing them through a construction having the area of therisers and pools substantially within the relation mentioned. The higherboiling point fractions may be satisfactorily eliminated and an endpointgasoline distillate produced.

' As illustrative of the manner-in which the vapors are treated, akerosene distillate of approximately 42.1 Baum having an initial 7boiling'point of 330 F, and an endpoint or dry distillate temperature of534 F., was obtained by ordinary distillation. This distillate was thenredistilled and the vapors passed through a fractionating tower such asthat hereinbefore described. From this kerosene there was obtained 60%of distillate withip the boiling range; of gasoline, or 437 tendingbetween headers, one of said headers being fixed to the exterior of saidtower opposite said box, and the other header being slidably mountedentirely in said box, to permitexpansion of the reboilingelementsin'dependently of the tower.

2. An apparatus'for refluxing hydrocarbon vapors comprising a towerhaving inlet and 7 outlet ports,,a plurality ofhorizontal' pans arrangedwithin said tower,

one above the other,

associated wi the successive pans, means for maintaining adapted tosupport'liqui-dpools, liquid sealed risers and liquid downcomer pipes jththe pans adapted to'permit so i a liquid level in the lower portion ofsaid i tower, an outwardly extending box mounted 011 the exterior oftheshell of said tower be- Y low the liquid level, a reboiling elementpositioned within the lower portion of said tower,

said reboiling element consisting of a plurality of tubes extendingbetween headers, one k of the headers for said element being mountedexteriorly of the tower opposite said box,

the other header forsaid element being floatingly mounted within saidbox,'and being positioned within the box so as'to extend on the outsideof the inner surface of the shell.

, WALTER M. onoss. Y

\Vhen 395 Baum North Texas crude oil 7 was distilled, 10%. more gasolinewasobtained from it than by distillation with the ordinary fractionatingtower. It is understood, of course, that the vapors, passing over fromthe top of the dephlegmatingcolumn, are directed to a condensing meansand thence to a collecting tank or storage where the gasoline-likedistillate is accumulated.

I claim as my invention:

1. An apparatus for treating hydrocarbon vapors comprising a tower, aplurality of horizontal pans positioned in said tower, one above theother, each adapted to support a pool of liquid, liquid sealed risersassociated with each of said pans, liquid downcomer positioned relativeto the pans to convey excess liquid from one pan to beneatlrthe surfaceof liquid in the pan just below, said tower having a vapor inlet portadjacent the lowermost panand an outlet port at the top thereof,

means for maintaining a body of reflux conelement consisting of aplurality of tubes ex- V

